Blacks Fork is a 175-mile-long (282 km) tributary of the Green River in Utah and Wyoming in the United States.
Blacks Fork
Green River (Colorado River tributary)
The Green River, located in the western United States, is the chief tributary of the Colorado River. The watershed of the river, known as the Green River Basin, covers parts of the U.S. states of Wyoming, Utah, and Colorado. The Green River is 730 miles (1,170 km) long, beginning in the Wind River Mountains of Wyoming and flowing through Wyoming and Utah for most of its course, except for a short segment of 40 miles (64 km) in western Colorado. Much of the route traverses the arid Colorado Plateau, where the river has carved some of the most spectacular canyons in the United States. The Green is slightly smaller than Colorado when the two rivers merge but typically carries a larger load of silt. The average yearly mean flow of the river at Green River, Utah is 6,121 cubic feet (173.3 m3) per second.
The Green River near Canyonlands National Park
Upper Green River, Wyoming
The Green River flows through Split Mountain Canyon before leaving Dinosaur National Monument in a meandering path across a broad irrigated flood plain
Green River, Wyoming, by Thomas Moran, 1878